map builder module

src/main.rs

@@ -14,6 +14,7 @@ mod rect;
 pub use rect::Rect;
 mod gamelog;
 mod gui;
+pub mod map_builders;
 mod saveload_system;
 mod spawner;
 mod visibility_system;
@@ -143,11 +144,14 @@ impl State {
         // Build new map
         let worldmap;
         let current_depth;
+        let player_start;
         {
             let mut worldmap_resource = self.ecs.write_resource::<Map>();
             current_depth = worldmap_resource.depth;
             let mut rng = self.ecs.write_resource::<RandomNumberGenerator>();
-            *worldmap_resource = Map::new_map_rooms_and_corridors(&mut rng, current_depth + 1);
+            let (newmap, start) = map_builders::build_random_map(&mut rng, current_depth + 1);
+            *worldmap_resource = newmap;
+            player_start = start;
             worldmap = worldmap_resource.clone();
         }
 
@@ -157,15 +161,14 @@ impl State {
         }
 
         // Place the player and update resources
-        let (player_x, player_y) = worldmap.rooms[0].centre();
         let mut player_position = self.ecs.write_resource::<Point>();
-        *player_position = Point::new(player_x, player_y);
+        *player_position = Point::new(player_start.x, player_start.y);
         let mut position_components = self.ecs.write_storage::<Position>();
         let player_entity = self.ecs.fetch::<Entity>();
         let player_pos_comp = position_components.get_mut(*player_entity);
         if let Some(player_pos_comp) = player_pos_comp {
-            player_pos_comp.x = player_x;
-            player_pos_comp.y = player_y;
+            player_pos_comp.x = player_start.x;
+            player_pos_comp.y = player_start.y;
         }
 
         // Dirtify viewshed
@@ -196,10 +199,13 @@ impl State {
 
         // Build a new map and place the player
         let worldmap;
+        let player_start;
         {
             let mut worldmap_resource = self.ecs.write_resource::<Map>();
             let mut rng = self.ecs.write_resource::<RandomNumberGenerator>();
-            *worldmap_resource = Map::new_map_rooms_and_corridors(&mut rng, 1);
+            let (newmap, start) = map_builders::build_random_map(&mut rng, 1);
+            *worldmap_resource = newmap;
+            player_start = start;
             worldmap = worldmap_resource.clone();
         }
 
@@ -209,7 +215,7 @@ impl State {
         }
 
         // Place the player and update resources
-        let (player_x, player_y) = worldmap.rooms[0].centre();
+        let (player_x, player_y) = (player_start.x, player_start.y);
         let player_entity = spawner::player(&mut self.ecs, player_x, player_y, "Player".to_string());
         let mut player_position = self.ecs.write_resource::<Point>();
         *player_position = Point::new(player_x, player_y);
@@ -524,23 +530,22 @@ fn main() -> rltk::BError {
     gs.ecs.register::<SerializationHelper>();
     gs.ecs.insert(SimpleMarkerAllocator::<SerializeMe>::new());
 
-    // Create RNG.
+    // Create seed.
     let mut rng = rltk::RandomNumberGenerator::new();
     // Use seed to generate the map.
-    let map = Map::new_map_rooms_and_corridors(&mut rng, 1);
+    let (map, player_start) = map_builders::build_random_map(&mut rng, 1);
     // Insert seed into the ECS.
     gs.ecs.insert(rng);
 
-    let (player_x, player_y) = map.rooms[0].centre();
     let player_name = "wanderer".to_string();
-    let player_entity = spawner::player(&mut gs.ecs, player_x, player_y, player_name);
+    let player_entity = spawner::player(&mut gs.ecs, player_start.x, player_start.y, player_name);
 
     for room in map.rooms.iter().skip(1) {
         spawner::spawn_room(&mut gs.ecs, room, 1);
     }
 
     gs.ecs.insert(map);
-    gs.ecs.insert(Point::new(player_x, player_y));
+    gs.ecs.insert(Point::new(player_start.x, player_start.y));
     gs.ecs.insert(player_entity);
 
     gamelog::setup_log();

src/map.rs

@@ -1,8 +1,7 @@
 use super::Rect;
-use rltk::{Algorithm2D, BaseMap, Point, RandomNumberGenerator, Rltk, RGB};
+use rltk::{Algorithm2D, BaseMap, Point, Rltk, RGB};
 use serde::{Deserialize, Serialize};
 use specs::prelude::*;
-use std::cmp::{max, min};
 use std::collections::HashSet;
 use std::ops::{Add, Mul};
 
@@ -15,7 +14,6 @@ pub enum TileType {
 
 pub const MAPWIDTH: usize = 80;
 pub const MAPHEIGHT: usize = 43;
-const MAX_OFFSET: u8 = 32;
 pub const MAPCOUNT: usize = MAPHEIGHT * MAPWIDTH;
 
 #[derive(Default, Serialize, Deserialize, Clone)]
@@ -45,30 +43,23 @@ impl Map {
         (y as usize) * (self.width as usize) + (x as usize)
     }
 
-    fn apply_room_to_map(&mut self, room: &Rect) {
-        for y in room.y1 + 1..=room.y2 {
-            for x in room.x1 + 1..=room.x2 {
-                let idx = self.xy_idx(x, y);
-                self.tiles[idx] = TileType::Floor;
-            }
-        }
-    }
-
-    fn apply_horizontal_tunnel(&mut self, x1: i32, x2: i32, y: i32) {
-        for x in min(x1, x2)..=max(x1, x2) {
-            let idx = self.xy_idx(x, y);
-            if idx > 0 && idx < (self.width as usize) * (self.height as usize) {
-                self.tiles[idx as usize] = TileType::Floor;
-            }
-        }
-    }
-
-    fn apply_vertical_tunnel(&mut self, y1: i32, y2: i32, x: i32) {
-        for y in min(y1, y2)..=max(y1, y2) {
-            let idx = self.xy_idx(x, y);
-            if idx > 0 && idx < (self.width as usize) * (self.height as usize) {
-                self.tiles[idx as usize] = TileType::Floor;
-            }
+    pub fn new(new_depth: i32) -> Map {
+        Map {
+            tiles: vec![TileType::Wall; MAPCOUNT],
+            rooms: Vec::new(),
+            width: MAPWIDTH as i32,
+            height: MAPHEIGHT as i32,
+            revealed_tiles: vec![false; MAPCOUNT],
+            visible_tiles: vec![false; MAPCOUNT],
+            lit_tiles: vec![true; MAPCOUNT], // NYI: Light sources. Once those exist, we can set this to false.
+            telepath_tiles: vec![false; MAPCOUNT],
+            red_offset: vec![0; MAPCOUNT],
+            green_offset: vec![0; MAPCOUNT],
+            blue_offset: vec![0; MAPCOUNT],
+            blocked: vec![false; MAPCOUNT],
+            depth: new_depth,
+            bloodstains: HashSet::new(),
+            tile_content: vec![Vec::new(); MAPCOUNT],
         }
     }
 
@@ -92,81 +83,6 @@ impl Map {
             content.clear();
         }
     }
-
-    /// Makes a procgen map out of rooms and corridors, and returns the rooms and the map.
-    pub fn new_map_rooms_and_corridors(rng: &mut RandomNumberGenerator, new_depth: i32) -> Map {
-        let mut map = Map {
-            tiles: vec![TileType::Wall; MAPCOUNT],
-            rooms: Vec::new(),
-            width: MAPWIDTH as i32,
-            height: MAPHEIGHT as i32,
-            revealed_tiles: vec![false; MAPCOUNT],
-            visible_tiles: vec![false; MAPCOUNT],
-            lit_tiles: vec![true; MAPCOUNT], // NYI: Light sources. Once those exist, we can set this to false.
-            telepath_tiles: vec![false; MAPCOUNT],
-            red_offset: vec![0; MAPCOUNT],
-            green_offset: vec![0; MAPCOUNT],
-            blue_offset: vec![0; MAPCOUNT],
-            blocked: vec![false; MAPCOUNT],
-            depth: new_depth,
-            bloodstains: HashSet::new(),
-            tile_content: vec![Vec::new(); MAPCOUNT],
-        };
-
-        const MAX_ROOMS: i32 = 30;
-        const MIN_SIZE: i32 = 6;
-        const MAX_SIZE: i32 = 10;
-
-        for idx in 0..map.red_offset.len() {
-            let roll = rng.roll_dice(1, MAX_OFFSET as i32);
-            map.red_offset[idx] = roll as u8;
-        }
-        for idx in 0..map.green_offset.len() {
-            let roll = rng.roll_dice(1, MAX_OFFSET as i32);
-            map.green_offset[idx] = roll as u8;
-        }
-        for idx in 0..map.blue_offset.len() {
-            let roll = rng.roll_dice(1, MAX_OFFSET as i32);
-            map.blue_offset[idx] = roll as u8;
-        }
-
-        for _i in 0..MAX_ROOMS {
-            let w = rng.range(MIN_SIZE, MAX_SIZE);
-            let h = rng.range(MIN_SIZE, MAX_SIZE);
-            let x = rng.roll_dice(1, map.width - w - 1) - 1;
-            let y = rng.roll_dice(1, map.height - h - 1) - 1;
-            let new_room = Rect::new(x, y, w, h);
-            let mut ok = true;
-            for other_room in map.rooms.iter() {
-                if new_room.intersect(other_room) {
-                    ok = false;
-                }
-            }
-            if ok {
-                map.apply_room_to_map(&new_room);
-
-                if !map.rooms.is_empty() {
-                    let (new_x, new_y) = new_room.centre();
-                    let (prev_x, prev_y) = map.rooms[map.rooms.len() - 1].centre();
-                    if rng.range(0, 2) == 1 {
-                        map.apply_horizontal_tunnel(prev_x, new_x, prev_y);
-                        map.apply_vertical_tunnel(prev_y, new_y, new_x);
-                    } else {
-                        map.apply_vertical_tunnel(prev_y, new_y, prev_x);
-                        map.apply_horizontal_tunnel(prev_x, new_x, new_y);
-                    }
-                }
-
-                map.rooms.push(new_room);
-            }
-        }
-
-        let stairs_position = map.rooms[map.rooms.len() - 1].centre();
-        let stairs_idx = map.xy_idx(stairs_position.0, stairs_position.1);
-        map.tiles[stairs_idx] = TileType::DownStair;
-
-        map
-    }
 }
 
 impl Algorithm2D for Map {

src/map_builders/common.rs

@@ -0,0 +1,29 @@
+use super::{Map, Rect, TileType};
+use std::cmp::{max, min};
+
+pub fn apply_room_to_map(map: &mut Map, room: &Rect) {
+    for y in room.y1 + 1..=room.y2 {
+        for x in room.x1 + 1..=room.x2 {
+            let idx = map.xy_idx(x, y);
+            map.tiles[idx] = TileType::Floor;
+        }
+    }
+}
+
+pub fn apply_horizontal_tunnel(map: &mut Map, x1: i32, x2: i32, y: i32) {
+    for x in min(x1, x2)..=max(x1, x2) {
+        let idx = map.xy_idx(x, y);
+        if idx > 0 && idx < (map.width as usize) * (map.height as usize) {
+            map.tiles[idx as usize] = TileType::Floor;
+        }
+    }
+}
+
+pub fn apply_vertical_tunnel(map: &mut Map, y1: i32, y2: i32, x: i32) {
+    for y in min(y1, y2)..=max(y1, y2) {
+        let idx = map.xy_idx(x, y);
+        if idx > 0 && idx < (map.width as usize) * (map.height as usize) {
+            map.tiles[idx as usize] = TileType::Floor;
+        }
+    }
+}

src/map_builders/mod.rs

@@ -0,0 +1,15 @@
+use super::{spawner, Map, Position, Rect, TileType};
+mod simple_map;
+use simple_map::SimpleMapBuilder;
+mod common;
+use common::*;
+use rltk::RandomNumberGenerator;
+use specs::prelude::*;
+
+trait MapBuilder {
+    fn build(rng: &mut RandomNumberGenerator, new_depth: i32) -> (Map, Position);
+}
+
+pub fn build_random_map(rng: &mut RandomNumberGenerator, new_depth: i32) -> (Map, Position) {
+    SimpleMapBuilder::build(rng, new_depth)
+}

src/map_builders/simple_map.rs

@@ -0,0 +1,77 @@
+use super::{
+    apply_horizontal_tunnel, apply_room_to_map, apply_vertical_tunnel, spawner, Map, MapBuilder, Position, Rect,
+    TileType,
+};
+use rltk::RandomNumberGenerator;
+use specs::prelude::*;
+
+pub struct SimpleMapBuilder {}
+
+impl MapBuilder for SimpleMapBuilder {
+    fn build(rng: &mut RandomNumberGenerator, new_depth: i32) -> (Map, Position) {
+        let mut map = Map::new(new_depth);
+        let player_pos = SimpleMapBuilder::rooms_and_corridors(rng, &mut map);
+
+        return (map, player_pos);
+    }
+}
+
+impl SimpleMapBuilder {
+    fn rooms_and_corridors(rng: &mut RandomNumberGenerator, map: &mut Map) -> Position {
+        const MAX_ROOMS: i32 = 30;
+        const MIN_SIZE: i32 = 6;
+        const MAX_SIZE: i32 = 10;
+        const MAX_OFFSET: u8 = 32;
+
+        for idx in 0..map.red_offset.len() {
+            let roll = rng.roll_dice(1, MAX_OFFSET as i32);
+            map.red_offset[idx] = roll as u8;
+        }
+        for idx in 0..map.green_offset.len() {
+            let roll = rng.roll_dice(1, MAX_OFFSET as i32);
+            map.green_offset[idx] = roll as u8;
+        }
+        for idx in 0..map.blue_offset.len() {
+            let roll = rng.roll_dice(1, MAX_OFFSET as i32);
+            map.blue_offset[idx] = roll as u8;
+        }
+
+        for _i in 0..MAX_ROOMS {
+            let w = rng.range(MIN_SIZE, MAX_SIZE);
+            let h = rng.range(MIN_SIZE, MAX_SIZE);
+            let x = rng.roll_dice(1, map.width - w - 1) - 1;
+            let y = rng.roll_dice(1, map.height - h - 1) - 1;
+            let new_room = Rect::new(x, y, w, h);
+            let mut ok = true;
+            for other_room in map.rooms.iter() {
+                if new_room.intersect(other_room) {
+                    ok = false
+                }
+            }
+            if ok {
+                apply_room_to_map(map, &new_room);
+
+                if !map.rooms.is_empty() {
+                    let (new_x, new_y) = new_room.centre();
+                    let (prev_x, prev_y) = map.rooms[map.rooms.len() - 1].centre();
+                    if rng.range(0, 2) == 1 {
+                        apply_horizontal_tunnel(map, prev_x, new_x, prev_y);
+                        apply_vertical_tunnel(map, prev_y, new_y, new_x);
+                    } else {
+                        apply_vertical_tunnel(map, prev_y, new_y, prev_x);
+                        apply_horizontal_tunnel(map, prev_x, new_x, new_y);
+                    }
+                }
+
+                map.rooms.push(new_room);
+            }
+        }
+
+        let stairs_position = map.rooms[map.rooms.len() - 1].centre();
+        let stairs_idx = map.xy_idx(stairs_position.0, stairs_position.1);
+        map.tiles[stairs_idx] = TileType::DownStair;
+
+        let start_pos = map.rooms[0].centre();
+        return Position { x: start_pos.0, y: start_pos.1 };
+    }
+}